Planet gamma Cephei Ab

Detailed information about planet gamma Cephei Ab and its parameters.

Planet

Name
gamma Cephei Ab
Planet Status
Confirmed
Discovered in
2003
Update
2024-07-28
Mass
17.539 ( +0.745 -0.745 ) MJ
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity
ω
Tperi
Radius
Inclination
Detection Method
Radial Velocity, Astrometry
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names
gam Cephei Ab, Errai b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

11 Jan 2011: Reffert et al. 2011 give a mass range derived from astrometry 5.0 - 26.9 MJup at the 3 σ level .
The errors on inclination are at the 3 σ level (Reffert et al. 2011)
27 September 02: The star is part of a binary system with period 70 yrs ± 16 yrs, with an eccentricity of 0.439 ± 0.06 (Cochran et al 2002).
28 Jul 2024: See also Planets in Binaries webpage.

Star

15 Nov. 06: Binary star companion at 1.467 arc sec; orbital period 67.5 ± 1.4 yr and an orbit inclination 119 ± deg.(Neuhäuser et al 200T)

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